Do you mean .5 (point 5 Mg's), or 5 Mg's) ? 5 Mg's is a large dose. I take Klonopin, and I take 2Mg's 3 times per day, and my Dr. says I'm "maxed out", so my total dosage is 6 Mg's per day. I am hoping you mean 0.5Mg's. The other way (5 Mg's) is too much.Anyway, it should take effect in 1 hour. For some people, it takes 2 days of taking the meds for it to reach it's full effect, but normally, it takes effect immediately.

OK, so you really don't know what to expect from the medication. It's hard to tell if a new medicine is working or not if you don't know how you will react to it.In other words, you can't tell if it's working yet. After taking it for a week or so, you will know if it's working if you miss a dose, and you feel "weird" without it.